rhodin



(No Model.)

J. G. A. RHODIN. PLATE FOR SECONDARY VOLTAIG BATTERIES.

No.567,046. Patented Sept. 1, 1896.

TO LITHQ, wAsmumou n L UNITED STATES PATENT O FICE.

JOHN G. A. RHODIN, OF CLIFTON HALL, ENGLAND, ASSIGNOR TO THE CHLORIDEELECTRICAL STORAGE SYNDICATE, LIMITED,. OF CLIFTON JUNCTION, ENGLAND.

PLATE-FOR SECONDARY VOLTAIC BATTERIES SPECIFICATION forming part ofLetters Patent No. 567,045, dated September 1, 1896.

Original application filed September 25, 1895, Serial No. 564,966.Divided and this application filed April 23, 1896. Serial No. 588,815.(to model.) Patented in England May 2,1895, No. 8,728; in FranceSeptember 4,1895,N0.250,070; in Belgium September '7, 1895, No.117,303,- in Cape Colony g t mber 26,1895,N0.492; in Hungary September29,1895,N0- 8,723; in New South Wales October 14, 1895, No. 6,121; inItaly October 22, 1895, LXXVIII, 99; in Victoria October 22, 1895, No.12,611 in Austria November 6,1895,No.45/4,197; in Canada November9,1895,No. 50,530, and in Spain November To all whom it may concern.-

Be it known that I, JOHN GUSTAF ADOLF RHODIN, a citizen of Sweden,residing at Clifton I-Iall, near Manchester, in the county of Lancaster,England, have invented certain new and useful Improvements in Plates forSecondary Voltaic Batteries, (for which Ihave obtained patents in thefollowing countries, viz: Austria November 6,1895,N0.4,197/; BelgiumSeptember 7, 1895, No. 117,303; Canada November 9, 1895, No. 50,530;Cape of Good Hope September 26, 1895, No. 492; France September 4, 1895,No. 250,070, Great Britain May 2, 1895, No. 8,728; Hungary September 29,1895, No. 3,723; Italy October 22, 1895, LXXVIII, 99; New South WalesOctober 14, 1895, No. 6,121; Spain November 25, 1895, No. 17,936, and inVictoria October 22, 1895, No. 12,611,) of which the following is aspecification.

This invention relates to the construction of plates and of plugsforsecondary batteries, and is a division of my application for LettersPatent filed September 25, 1895, and numbered in serial 564,966.

The invention consists in the novel construction of battery-plates andof the plugs of active material therefor as hereinafter described andclaimed.

In the accompanying drawings, Figure 1 is an elevation of part of aplate constructed in accordance with my invention. Fig. 2 is across-section. Fig. 3 is a detail of the plug of active material. Fig.4, 5, 6, and 7 are perspective views of sections of different forms ofsheets which when rolled form plugs of active material.

In the said drawings, the reference-letter A designates the frameplatealloyed with a little antimony and provided with perforations A for thereception and retention of the plugs of active material,the edges ofsaid perforations being preferably chamfered off, as

' shown in Fig. 2, to facilitate the introduction of the plugs.

The reference-letter B designates a plug of active material to fit theperforations A .of the plate A. This plug of active material isconstructed with projecting solid ribs, as shown in the drawings. Theseprojecting solid ribs may be given different forms, such as illustratedat b, 5 and b and instead of being continuous, as in Figs. 4, 5, and 6,they may be discontinuous, as in Fig. 7, and the ribs may be formed uponboth sides of the strip of lead, as shown in Fig. 4, or upon one sidethereof only, as in Figs. 5 and 6. The projecting ribs are joinedtogether bya film, which serves to keep them together. These plugs areinserted in the respective perforations and are acted upon by theelectrolyte for production of the requisite active material or peroxid.

In the preferable practice the frame-plate is laid on a fiat bed andpreferably the ends of the roll plug inserted into one of the holes andcut off level with the face of the plate, and this is continued untileach perforation is occupied.

The plate when prepared in accordance with myinvention to be used as apositive plate is then treated by any of the Well-known methods for theformation of peroxid on the plugs, the expansion under such actionserving to secure the plugs firmly in place.

- The invention is equally applicable to negative plates. The plugsconstructed in accordance with my invention have great regularity ofstructure and are sufficiently permeable to allow passage for theelectrolyte through them, and they admit of expansion without injury tothe frame-plate. They have good conducting contact with the frame, andthe method of construction is simple, economical, and perhaps preferableto the construction of plugs of separate wires or rods, as described inmy application for Letters Patent of which this is a division.

In Fig. 6 I have illustrated a form of plug wherein the projecting solidribs are formed upon one side only of the sheet or strip, the other sidebeing fiat.

Having thus described the nature of this invention and in what mannerthe same is to be performed, I claim 1. The herein-described plate forsecondary batteries consisting of a perforated frameplate, in.combination with plugs composed of a roll of lead provided withprojecting solid ribs joined by a thin film of lead, said plugs fillingthe perforations of said frame-plate and JOHN G. A. RHODIN.

Vitnesses:

Mrs. S. BROADFOOT, PERCY W. HOLT.

